body{
    color: #fb5;
    background-color: #334;
}
/*定义正常链接的样式*/
a:link{
    color: #445;
    background-color: #eb5;
}
/*定义已访问过链接的样式*/
a:visited{
    color: #345;
    background-color: #eb6;
}
/*定义鼠标悬浮在链接上时的样式*/
a:hover{
    color: #667;
    background-color: #fb5;
}
/*定义鼠标点击链接时的样式*/
a:active{
    color: #778;
    background-color: #ec8;
}

#header{
    color: #ec8;
    background-color: #334;
    border-color: #667;
}

#nav{
    color: #445;
    background-color: #789;
    border-color: #667;
}
#content{
    color: #223;
    background-color: #edc;
    border-color: #667;
}
#nav a{
    text-decoration: none;
}
#nav a:link,#nav a:visited{
    color: #eef;
    background-color: transparent;
    border-color: #99a;
}
#nav a:hover{
    color: #445;
    background-color: #eb6;
}
#nav a:active{
    color: #667;
    background-color: #ec8;
}
